Is-the-Current-Windows-user-a-Computer-Administrator-Programmatically-Check-from-Delphi


            Title: Is the Current Windows user a Computer Administrator - Programmatically Check from Delphi
In Windows there are two main types of user acount types: "Computer Administrator" and "Limited".
Computer Administrator accounts allow the user to change all computer settings: install programs, make system wide changes, etc.
If you need to check, from your Delphi application, if the currently logged user is an administrator or a member of the Administrators group, use the "IsWindowsAdmin" function:
 unit WindowsUser;
 
 interface
 uses Windows;
 
 //returns True if the currently logged Windows user has Administrator rights
 function IsWindowsAdmin: Boolean;
 
 implementation
 
 const
 SECURITY_NT_AUTHORITY: TSIDIdentifierAuthority = (Value: (0, 0, 0, 0, 0, 5)) ;
 
 const
 SECURITY_BUILTIN_DOMAIN_RID = $00000020;
 DOMAIN_ALIAS_RID_ADMINS = $00000220;
 
 
 function IsWindowsAdmin: Boolean;
 var
 hAccessToken: THandle;
 ptgGroups: PTokenGroups;
 dwInfoBufferSize: DWORD;
 psidAdministrators: PSID;
 g: Integer;
 bSuccess: BOOL;
 begin
 Result := False;
 
 bSuccess := OpenThreadToken(GetCurrentThread, TOKEN_QUERY, True, hAccessToken) ;
 if not bSuccess then
 begin
 if GetLastError = ERROR_NO_TOKEN then
 bSuccess := OpenProcessToken(GetCurrentProcess, TOKEN_QUERY, hAccessToken) ;
 end;
 
 
 if bSuccess then
 begin
 GetMem(ptgGroups, 1024) ;
 
 bSuccess := GetTokenInformation(hAccessToken, TokenGroups, ptgGroups, 1024, dwInfoBufferSize) ;
 
 CloseHandle(hAccessToken) ;
 
 if bSuccess then
 begin
 AllocateAndInitializeSid(SECURITY_NT_AUTHORITY, 2, SECURITY_BUILTIN_DOMAIN_RID, DOMAIN_ALIAS_RID_ADMINS, 0, 0, 0, 0, 0, 0, psidAdministrators) ;
 
 for g := 0 to ptgGroups.GroupCount - 1 do
 if EqualSid(psidAdministrators, ptgGroups.Groups[g].Sid) then
 begin
 Result := True;
 Break;
 end;
 
 FreeSid(psidAdministrators) ;
 end;
 
 FreeMem(ptgGroups) ;
 end;
 end;
 
 end.
System Delphi
